The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2002
Filed:
Sep. 15, 1999
Moshe Schreiber, Brookline, MA (US);
Ishay Kedem, Brookline, MA (US);
Yuval Ofek, Framingham, MA (US);
Natan Vishlitzky, Brookline, MA (US);
Eli Shagam, Brookline, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Load balancing of activities on physical disk storage devices is accomplished by monitoring reading and writing operations to blocks of contiguous storage locations, such as logical volumes on the physical disk storage devices to obtain disk utilization information. The disk utilization information provides a selection of one block pair. After testing to determine any adverse effect of making that change, an exchange is made to more evenly distribute the loading on individual physical disk storage devices. The exchange involves the use of a pair of specially configured logical volumes that receive copies of the data to be exchanged, allow a reconfiguration of the blocks in the block pair and the transfer of the data back to the other blocks in the block pair to effect the exchange.